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<h4 id="jQuery-库-CDN加速"><a href="#jQuery-库-CDN加速" class="headerlink" title="jQuery 库 CDN加速"></a>jQuery 库 CDN加速</h4><figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">&quot;https://cdn.bootcss.com/jquery/3.4.1/jquery.js&quot;</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>

<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE <span class="keyword">html</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span> <span class="attr">lang</span>=<span class="string">&quot;en&quot;</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">&quot;UTF-8&quot;</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">title</span>&gt;</span>Title<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">&quot;https://cdn.bootcss.com/jquery/3.4.1/core.js&quot;</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>

<span id="more"></span>

<h5 id="选择器"><a href="#选择器" class="headerlink" title="选择器"></a>选择器</h5><figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE <span class="keyword">html</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span> <span class="attr">lang</span>=<span class="string">&quot;en&quot;</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">&quot;UTF-8&quot;</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">title</span>&gt;</span>Title<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">&quot;https://cdn.bootcss.com/jquery/3.4.1/jquery.js&quot;</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">a</span> <span class="attr">href</span>=<span class="string">&quot;&quot;</span> <span class="attr">id</span>=<span class="string">&quot;test-jquery&quot;</span>&gt;</span>点击<span class="tag">&lt;/<span class="name">a</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span><span class="language-javascript"></span></span><br><span class="line"><span class="language-javascript">    <span class="comment">//选择器就是 CSS 选择器</span></span></span><br><span class="line"><span class="language-javascript">    $(<span class="string">&#x27;#test-jquery&#x27;</span>).<span class="title function_">click</span>(<span class="keyword">function</span> (<span class="params"></span>) &#123;</span></span><br><span class="line"><span class="language-javascript">        <span class="title function_">alert</span>(<span class="string">&#x27;点击&#x27;</span>);</span></span><br><span class="line"><span class="language-javascript">    &#125;)</span></span><br><span class="line"><span class="language-javascript"></span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>

<blockquote>
<p>公式：$(selector).action()</p>
</blockquote>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line">$(&#x27;p&#x27;).click();		//标签选择器</span><br><span class="line">$(&#x27;#id&#x27;).click();		//Id选择器</span><br><span class="line">$(&#x27;.class&#x27;).click();	//类选择器</span><br></pre></td></tr></table></figure>



<h5 id="鼠标事件"><a href="#鼠标事件" class="headerlink" title="鼠标事件"></a>鼠标事件</h5><p><img src="https://gcore.jsdelivr.net/gh/PaulGeorge123/cloudimg@master/img/all/image-20200219134650477.png"></p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line">//当网页加载完毕之后，响应事件</span><br><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span><span class="language-javascript"></span></span><br><span class="line"><span class="language-javascript">	$(<span class="keyword">function</span>(<span class="params"></span>)&#123;</span></span><br><span class="line"><span class="language-javascript"></span></span><br><span class="line"><span class="language-javascript">&#125;);</span></span><br><span class="line"><span class="language-javascript"></span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>



<h4 id="操作DOM"><a href="#操作DOM" class="headerlink" title="操作DOM"></a>操作DOM</h4><figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE <span class="keyword">html</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span> <span class="attr">lang</span>=<span class="string">&quot;en&quot;</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">&quot;UTF-8&quot;</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">title</span>&gt;</span>Title<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">&quot;https://cdn.bootcss.com/jquery/3.4.1/jquery.js&quot;</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">ul</span> <span class="attr">id</span>=<span class="string">&quot;test-ul&quot;</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">li</span> <span class="attr">class</span>=<span class="string">&quot;javascript&quot;</span>&gt;</span>javascript<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">li</span> <span class="attr">name</span>=<span class="string">&quot;python&quot;</span>&gt;</span>python<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">ul</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span><span class="language-javascript"></span></span><br><span class="line"><span class="language-javascript">    $(<span class="string">&#x27;#test-ul li[name = python]&#x27;</span>).<span class="title function_">text</span>();</span></span><br><span class="line"><span class="language-javascript">    $(<span class="string">&#x27;#test-ul&#x27;</span>).<span class="title function_">html</span>();</span></span><br><span class="line"><span class="language-javascript">    <span class="variable language_">console</span>.<span class="title function_">log</span>($(<span class="string">&#x27;#test-ul li[name = python]&#x27;</span>).<span class="title function_">text</span>());</span></span><br><span class="line"><span class="language-javascript">    <span class="variable language_">console</span>.<span class="title function_">log</span>($(<span class="string">&#x27;#test-ul&#x27;</span>).<span class="title function_">html</span>());</span></span><br><span class="line"><span class="language-javascript"></span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>

<h5 id="节点文本操作"><a href="#节点文本操作" class="headerlink" title="节点文本操作"></a>节点文本操作</h5><figure class="highlight html"><table><tr><td class="code"><pre><span class="line">$(&#x27;#test-ul li[name = python]&#x27;).text();	//获得值</span><br><span class="line">$(&#x27;#test-ul li[name = python]&#x27;).text(&#x27;设置值&#x27;);	//设置值</span><br><span class="line">$(&#x27;#test-ul&#x27;).html();	//获得值</span><br><span class="line">$(&#x27;#test-ul&#x27;).html(&#x27;<span class="tag">&lt;<span class="name">text</span>&gt;</span>123<span class="tag">&lt;/<span class="name">text</span>&gt;</span>&#x27;);	//设置值</span><br></pre></td></tr></table></figure>



<h5 id="结果"><a href="#结果" class="headerlink" title="结果"></a>结果</h5><p><img src="https://gcore.jsdelivr.net/gh/PaulGeorge123/cloudimg@master/img/all/image-20200219140539201.png"></p>
<h5 id="元素的显示与隐藏"><a href="#元素的显示与隐藏" class="headerlink" title="元素的显示与隐藏"></a>元素的显示与隐藏</h5><figure class="highlight javascript"><table><tr><td class="code"><pre><span class="line">$(<span class="string">&#x27;#test-ul li[name = python]&#x27;</span>).<span class="title function_">show</span>()</span><br><span class="line">$(<span class="string">&#x27;#test-ul li[name = python]&#x27;</span>).<span class="title function_">hide</span>()</span><br></pre></td></tr></table></figure>



<h5 id="使用-attr"><a href="#使用-attr" class="headerlink" title="使用 attr()"></a>使用 attr()</h5><figure class="highlight javascript"><table><tr><td class="code"><pre><span class="line"><span class="comment">//attr() 方法设置或返回被选元素的属性值</span></span><br><span class="line">$(selector).<span class="title function_">attr</span>(attribute)</span><br><span class="line"><span class="comment">//设置被选元素的属性和值	</span></span><br><span class="line">$(selector).<span class="title function_">attr</span>(attribute,value)</span><br><span class="line"><span class="comment">//设置被选元素的属性和值</span></span><br><span class="line">$(selector).<span class="title function_">attr</span>(attribute,<span class="keyword">function</span>(<span class="params">index,oldvalue</span>))</span><br></pre></td></tr></table></figure>

<h5 id="使用-change"><a href="#使用-change" class="headerlink" title="使用 change()"></a>使用 change()</h5><figure class="highlight bash"><table><tr><td class="code"><pre><span class="line"><span class="comment">#当元素的值改变时发生 change 事件（仅适用于表单字段）</span></span><br><span class="line"><span class="comment">#change() 方法触发 change 事件，或规定当发生 change 事件时运行的函数</span></span><br><span class="line"><span class="comment">#注意：当用于 select 元素时，change 事件会在选择某个选项时发生。当用于 text field 或 text area 时，#change 事件会在元素失去焦点时发生</span></span><br><span class="line"></span><br><span class="line">触发被选元素的 change 事件：</span><br><span class="line">$(selector).change()</span><br></pre></td></tr></table></figure>

<hr>
<blockquote>
<p>点击 触发 事件 的 jQuery 写法样式 (Thymeleaf)</p>
</blockquote>
<p><strong>on注册简单事件</strong></p>
<figure class="highlight javascript"><table><tr><td class="code"><pre><span class="line"><span class="comment">// 表示给$(selector)绑定事件，并且由自己触发，不支持动态绑定。</span></span><br><span class="line">$(selector).<span class="title function_">on</span>( <span class="string">&#x27;click&#x27;</span>, <span class="keyword">function</span>(<span class="params"></span>) &#123;&#125;);</span><br><span class="line"></span><br><span class="line">or</span><br><span class="line"></span><br><span class="line">$(selector).<span class="title function_">onclick</span>(<span class="keyword">function</span>(<span class="params"></span>) &#123;&#125;);</span><br></pre></td></tr></table></figure>

<p><strong>on注册事件委托</strong></p>
<figure class="highlight javascript"><table><tr><td class="code"><pre><span class="line"><span class="comment">// 表示给$(selector)绑定代理事件，支持动态绑定</span></span><br><span class="line">$(<span class="variable language_">document</span>).<span class="title function_">on</span>(<span class="string">&#x27;click&#x27;</span>, <span class="string">&#x27;#id&#x27;</span>, <span class="keyword">function</span> (<span class="params"></span>)&#123;...&#125;);</span><br></pre></td></tr></table></figure>

<p><strong>on注册事件的语法：</strong></p>
<figure class="highlight javascript"><table><tr><td class="code"><pre><span class="line"><span class="comment">// 第一个参数：events，绑定事件的名称可以是由空格分隔的多个事件（标准事件或者自定义事件）</span></span><br><span class="line"><span class="comment">// 第二个参数：selector, 执行事件的后代元素（可选），如果没有后代元素，那么事件将由自己执行。</span></span><br><span class="line"><span class="comment">// 第三个参数：data，传递给处理函数的数据，事件触发的时候通过event.data来使用（不常使用）</span></span><br><span class="line"><span class="comment">// 第四个参数：handler，事件处理函数</span></span><br><span class="line">$(selector).<span class="title function_">on</span>(events[,selector][,data],handler);</span><br></pre></td></tr></table></figure>

<blockquote>
<p> return false : 既能阻止事件冒泡，又能阻止浏览器默认行为。</p>
</blockquote>
</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="https://curry3035.gitee.io">PaulGeorge</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="https://curry3035.gitee.io/posts/63260/">https://curry3035.gitee.io/posts/63260/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://curry3035.gitee.io" target="_blank">Celts</a>！</span></div></div><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/%E8%84%9A%E6%9C%AC%E8%AF%AD%E8%A8%80/">脚本语言</a></div><div class="post_share"><div class="social-share" data-image="/img/avatar.jpg" 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href="#%E8%8A%82%E7%82%B9%E6%96%87%E6%9C%AC%E6%93%8D%E4%BD%9C"><span class="toc-number">2.1.</span> <span class="toc-text">节点文本操作</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#%E7%BB%93%E6%9E%9C"><span class="toc-number">2.2.</span> <span class="toc-text">结果</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#%E5%85%83%E7%B4%A0%E7%9A%84%E6%98%BE%E7%A4%BA%E4%B8%8E%E9%9A%90%E8%97%8F"><span class="toc-number">2.3.</span> <span class="toc-text">元素的显示与隐藏</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#%E4%BD%BF%E7%94%A8-attr"><span class="toc-number">2.4.</span> <span class="toc-text">使用 attr()</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#%E4%BD%BF%E7%94%A8-change"><span class="toc-number">2.5.</span> <span class="toc-text">使用 change()</span></a></li></ol></li></ol></div></div><div class="card-widget card-recent-post"><div class="item-headline"><i class="fas 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